Double-Sided Sunshade: The big outdoor umbrella is 15 x 9 x 7.8 feet, which is designed by extra-large double-sided. It can provide you with a large shadow area to protect your skin from UV rays 100% Polyester Fabric: The heavy duty 15 ft patio umbrella with base is made of 100% polyester that can be waterproof and UV resistant, high quality fade-resistant, long lasting, easy to clean Sturdy Structure: 12 steel ribs provide perfect support for the outdoor umbrella. And also, the powder coating can effectively prevent rust and corrosion of the steel ribs Patio Umbrella Base: This double umbrella comes with a durable umbrella base, including a cross base and 2 sandbags (no sand). For stability, each bag can be filled with 100-150 lbs sand Easy Operation: This 15 ft market umbrella has a crank mechanism, you can easily open and close the umbrella in a few seconds by rotating the crank handle For Multiple Scenes: You can use the 15 ft umbrella to create a cool and comfortable spot under an attractive piece of outdoor decor. It is perfect for outside, gardens, backyards, poolsides and beaches.